Quick answers
- Which hospitals does Brian S. Choi work at?
- Medicare's official clinician data lists Brian S. Choi at 1 hospital: Riverside Community Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Brian S. Choi see patients?
- Medicare's clinician data lists 5 practice locations, including Fountain Valley, CA, Anaheim, CA and Los Angeles, CA. Call before your visit to confirm the address.
- What is Brian S. Choi's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Brian S. Choi accept Medicare assignment?
- Yes. Medicare's clinician data says Brian S. Choi accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Brian S. Choi offer telehealth?
- Medicare's clinician data says Brian S. Choi offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Brian S. Choi?
- (714) 698-0300, as listed in official Medicare / NPI Registry data.
- What is Brian S. Choi's NPI number?
- 1386602720. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Brian S. Choi works
Medicare's Facility Affiliation Data lists Brian S. Choi at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Riverside Community HospitalRiverside, CA · Acute Care Hospital · CCN 050022
Practice locations
Addresses where Brian S. Choi is enrolled with Medicare (CMS data updated 2026-10-02).
- 11180 Warner Ave, Suite 351Fountain Valley, CA 92708 (714) 698‑0300
- 1211 W La Palma Ave, Suite 103Anaheim, CA 92801 (714) 999‑1465
- 1245 Wilshire Blvd, Suite 303Los Angeles, CA 90017 (213) 977‑1214
- 260 E Ontario Ave, Suite 101Corona, CA 92879 (951) 371‑2411
- 4500 Brockton Ave, Suite 107Riverside, CA 92501 (951) 276‑2760
Group practices
Medicare enrollment lists Brian S. Choi as a member of this group (CMS data updated 2026-10-02).
- Los Angeles Hematology-Oncology Medical Group50 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Fountain Valley
Clinicians with the same Medicare primary specialty in Fountain Valley, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1386602720 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians